- Featured in Physics
Unraveling Dicke Superradiant Decay with Separable Coherent Spin States
Phys. Rev. Lett. 135, 133602 – Published 23 September, 2025
DOI: https://doi.org/10.1103/xcxr-sm9c
Abstract
We show that idealized Dicke superradiant decay from a fully inverted state can at all times be described by a positive statistical mixture of coherent spin states (CSS). Since CSS are separable, this implies that no entanglement is involved in Dicke decay. Based on this result, we introduce a new numerical quantum trajectory approach leading to low-entanglement unravelings. This opens up new possibilities for employing matrix product state (MPS) techniques for large-scale numerical simulations with collective decay processes.
Physics Subject Headings (PhySH)
synopsis
Superradiance Without Entanglement
Scientists have shown that entanglement plays no role in a form of collective light emission called Dicke superradiance, settling a long-standing debate.
See more in Physics
